This is a pre-requisite to being able to make
qt6_qml_type_registration() an internal rather than public command.
Not all examples have been updated, only those that were using the
qt6_qml_type_registration() command.
Task-number: QTBUG-95093
Pick-to: 6.2
Change-Id: I3f1814a29af608461daa90477eca0aa2304eb9d1
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>